Scene size in Xcode 6 / SpriteKit / Swift - swift

Question

I've been getting stuck doing what should be really simple stuff in Xcode, I am trying to add a sprite to the scene and for it to sit in the bottom left corner:
var groundTexture : SKTexture = SKTexture(imageNamed: "dirt-block")
var ground : SKSpriteNode = SKSpriteNode(texture: groundTexture)
ground.position = CGPointMake(ground.size.width/2, ground.size.height/2)
self.addChild(ground)
This doesn't show anything, so I took a look at what the scene dimensions are and self.frame.size.width and self.frame.size.height are returning a width of 1024 and a height of 768, regardless of orientation.
I want this fixed in landscape mode if that makes any difference to the answer?
I'm obviously missing a very fundamental idea to do with setting up the scene, if anybody could shed any light it would be much appreciated.
Thanks.

Answer 1

You have to edit the GameViewController:
Cut everything from viewDidLoad() except super.viewDidLoad()
Overwrite viewWillLayoutSubviews
override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
if let scene = GameScene.unarchiveFromFile("GameScene") as? GameScene {
// Configure the view.
var skView = self.view as SKView
skView.showsFPS = true
skView.showsNodeCount = true
/* Sprite Kit applies additional optimizations to improve rendering performance */
skView.ignoresSiblingOrder = true
/* Set the scale mode to scale to fit the window */
scene.size = skView.bounds.size
scene.scaleMode = .AspectFill
skView.presentScene(scene)
}
}
Also you should set the scene size as you can see
scene.size = skView.bounds.size
Hope this helps
There is also a great Tutorial where this is explained better:
http://www.raywenderlich.com/49721/how-to-create-a-breakout-game-using-spritekit
(Chapter 1 or 2)